TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4445 SUBJECT: GRB 060108: Refined analysis of the Swift-BAT burst DATE: 06/01/08 17:38:20 GMT FROM: Scott Barthelmy at NASA/GSFC T. Sakamoto (GSFC/NRC), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hinshaw (GSFC-SPSYS), D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), P. Meszaros (PSU), D. Palmer (LANL), A. Parsons (GSFC), G. Sato (ISAS), J. Tueller (GSFC) on behalf of the Swift-BAT team: Using the data set from T-60.7 to T+104.6 sec from the recent telemetry downlink, we report further analysis of BAT GRB 060108 (trigger #176453) (Oates, et al., GCN 4443). The BAT ground-calculated position is RA,Dec = 147.016, 31.933 {9h 48m 3.9s, 31d 55' 59.8"} (deg; J2000) +- 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-tagged lightcurve shows a rise starting at T-5 sec, peaking at T+1 sec, and then a somewhat slower fall with a small secondary peak at T+10 sec (~4 sec wide). T90 (15-350 keV) is (14.4 +- 1) sec (estimated error including systematics). The power law index of the time-averaged spectrum is 2.01 +- 0.17. The fluence in the 15-150 keV band is (3.7 +- 0.4) x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.60 sec in the 15-150 keV band is (0.7 +- 0.1) ph/cm2/sec. All the quoted errors are at the 90% confidence level.